Pack of 10 bearings 6302ZZ for use in many applications, 6302ZZ Bearings are made of Chrome Steel, 6302ZZ can rotate up to 15,800 rpm with no problem, each 6302ZZ bearing has 2 Metal shields to protect the bearing from dust or any possible contamination, also 6302ZZ bearings are pre-lubricated with grease, Bearings are packed in the original manufacturer bag.